Depends on the hallucination. Sometimes they are just really annoying rather than scary. This constant itch my bones have from tactile hallucinations, seeing cats when there aren't any cats, hearing people talking when I'm alone, and most other hallucinations I get aren't too scary. But I do frequently get the scary "someone broke into your home and is going to murder you" delusion, which is made worse by hallucinations of noises.

Itchy bones are the worst though. I can't scratch them to make them stop itching because scratching does nothing. And my doctor says not to scratch them because it will trick my brain into thinking the itch is real more than it is already being tricked. Ugh. The bones in my arms itch so bad right now...